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Waste Water Engineering

Waste Water Engineering
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

100 ppm
50 ppm
150 ppm
200 ppm

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Waste Water Engineering
Pick up the incorrect size of stone ware sewers

67.5 cm
None of these
82.5 cm
52.5 cm

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Waste Water Engineering
If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains

Carbon dioxide
Oxygen
Methane
Hydrogen sulphide

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

1.350 D
1.425 D
1.250 D
1.625 D

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

300 m
100 m
200 m
150 m

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Waste Water Engineering
Which one of the following part of human body withstands minimum radiation?

Thyroid
Kidneys
Eyes
Ovaries/testis

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